When fitted to CMB, DESI BAO and supernova data, the ΛXCDM running-vacuum-plus-cosmon model produces an effective dark-energy equation of state that crosses the phantom divide at z≈0.4–0.8 and keeps the coincidence ratio of order one.
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$\Lambda$XCDM: a running vacuum strategy for crossing the phantom divide
When fitted to CMB, DESI BAO and supernova data, the ΛXCDM running-vacuum-plus-cosmon model produces an effective dark-energy equation of state that crosses the phantom divide at z≈0.4–0.8 and keeps the coincidence ratio of order one.